Muffler



` Sept.2s,1948. J J THOMAS '2,450,212v

MUFFLER Filed Feb. l2, 1946 IN VEN TOR.

Joseph cZT/z @ma ATTQ R N EYB Patented Sept. 28,**1948 l `AVAUNITED STATES PATENT lOFFICE MUFFLER Joseph J. Thomas, Los Angeles, Calif.

` Application February 12, 194s, serial No. 647,033

4 Claims. 1

This invention relates to muillers adapted for use in. the exhaust lines of internal combustion engines.

An object of the invention is to provide a muffler which is designed to burn unused gases passing through the exhaust line thus eliminating exces sive smoke.

Another object of the invention is to provide a muiiler that will draw cold air through passages formed between the inner and outer shells of the muiiler which will cool the muiiier and eliminate lire hazard.

With Athe above and other objects and advantages in view the invention consists of the novel details of construction arrangement and combination of `parts more fully hereinafter described, claimed and illustrated in the accompanying drawing in which:

Figure 1 is a perspective View of an embodiment of the invention.

Figure 2 is a sectional view on the line 2-2 of Figure 1 and Figure 3 is a sectional rview on the line 3-3 of Figure 2.

Referring more in detail to the drawing the reference numeral I0 generally designates a muiiler including the outer cylindrical casing or shell l2 having a closed end I4 apertured'at the center thereof to receive the inlet pipe I6 and an open end I8 adjacent to the circular plate 20 and the space between the open end of the casing and the plate can be regulated by the adjustable iiexible clamp or band 22 and the plate 20 is apertured to permit the egress of the outlet pipe 24 to which it is welded. Secured to the closed end I4 inwardly of the casing I2 and relatively spaced from the inlet pipe I6 is an inner tubular shell or casing 26, and the shell 2t extends longitudinally of the casing to terminate in the open end 28 inwardly of the open end t8 of the casing I2.

The shell 26 has secured inwardly thereof by welding or the like the injection cones 28 which are spaced equidistantly from each other and are provided with outlet mouths 3i). It is to be understood however, that while only four cones are shown it is to be understood that the cones can be increased in number as the size of the muiiler is increased.

Each cone 28' is provided with curved air ducts 32 which have their outlet ends 34 inwardly of the shell 26 and their inlet ends 36 outwardly of the shell 26 to be positioned in the air space 38 between the casing I2 and shell 25 and their outlet ends directed toward the outlet end of the casing.

These ducts are spaced one at each quarter around the shell 26 and it is to be understood that the number of ducts can be increased as desired providing one or more for each cone depending upon the size of the muiiler and the type of combustion engine with which it is to be used.

The gases passing from the engine into the series of injection cones produces a suction for drawing in air by means of the air ducts thus reducing the back or head pressure on thev engine. The suction developed will also draw cold air from the outside atmosphere through the air passage or space between the casing and shell into and through the air ducts. This will cause unused gases to burn inside the muffler, thus eliminating the smoke. Y

The outlet pipe 24 is formed as an extension of the last cone and forms as previously stated the outlet or tail pipe.

As previously stated, the plate 20 is welded to the outlet pipe 24 and the adjustment of the band 22 controls the air intake to the air passage and the air ducts.

It is believed that the operation of the muilier will be obvious to those skilled in the art and it is to be understood that changes may be made in the construction, arrangement and combination of parts provided they fall within the spirit of the invention and the scope of the appended claims.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

l. A device of the character described comprising a housing; a tubular shell fixed to and extending longitudinally of sai-d housing interiorly thereof; the shell being spaced from the housing to provide an air space therebetween; apertured injection cones arranged in spaced relation with one another and secured to the shell interiorly thereof means for discharging exhaust gases into the interior of the shell for flow through said cones; air ducts having their outlet ends discharging into the interior of the shell the ducts extending outwardly -of said shell and having their inlet ends disposed between said shell and said housing; an-d means for admitting air between said shell and housing for flow of the air through said ducts to the interior of said shell for entraining into the stream of exhaust gases owing through said cones.

2. A device of the character ydescribed comprising'a housing; a tubular shell xed to and extending longitudinally of said housing interiorly thereof; the shell being spaced from the housing to provide an air space therebetween; aperture-d injection cones arranged in spaced relation with one another and secured to the shell interiorly thereof; means for discharging exhaust gases into the interior of the shell for flow through said cones; air ducts having their outlet ends discharging into the interior of the shell; the ducts extending outwardly of said shell and having their inlet ends disposed between said shell and said housing; said shell having an outlet pipe; and means secured to said housing and outlet pipe for admitting air between said shell and housing for ilow of the air through said ducts to the interior of said shell for entraining into the stream of exhaust gases flowing through said cones.

3. A device of the character described oom--Y prising a housing; one end of housing being open and its opposite end closed; a tubular shell extending longitudinally of said housing interiorly thereof; the shell being spaced from the housing to provide an air space therebetween; apertured injection cones arranged in spaced relation with one another and secured to the shell interiorly thereof; means for discharging exhaust gases into the interior of the shell for flow through said cones; air ducts having their outlet ends discharging into the interior of the shell; the ducts extending outwardly of said shell and having their inlet ends disposed between said shell and said housing; said shell having an outlet pipe; and a plate secured to said outlet pipe and being spaced from the open end of the housing for admission of. air into the space between the housing and shell for flow of the air through said ducts into the stream of exhaust gases flowing through said cones.-

4. A device of the character described comprising a housing; one end of housing being open and its opposite end closed; a tubular shell extending longitudinally of said housing interiorly thereof; the shell being spaced from the housing to provide an air space therebetween; apertured injection cones arranged in spaced relation with one another and secured to the shell interiorly thereof; means for discharging exhaust gases into the interior of the shell for ilow through said cones; air ducts having their outlet. ends discharging into the interior of the shell; the ducts extending outwardly of said shell and having their inlet ends disposed between said shell and sai-d housing; said shell having an outlet pipe; a plate secured to said outlet pipe and being spaced from the open end of the housing for admission of air into the space between the housing and shell for iiow of the air through said ducts into thestream of exhaust gases flowing through said cones and a band extending around the open end of the housing, and being. adjustable toward and away from said plate to vary the. amount of space between the latter and the open end ofthe housing.

JOSEPH J. THOMAS REFERENCES CITED The following references are of record` inthe file of this patent:

UNITED' STATES PATENTS Number Name Date 1,468,895 Allan Sept. 25, 1923 1,577,626 Warth Mar. 23, 1926 1,637,347 Nelson Aug. 2,. 1927 2,233,327 Sauer Feb. 25, 1941 

